Antimatterics is the technical field concerned with the antimatter-powered spaceship engines that are used for travel between planets within star systems (where travel by means of jumps through hyperspace is not possible). In general, accelerations of greater than about 50 meters per second squared (5g) are rarely attained. As the threshold for black hole production is approached (See Figure 2, above right), energy requirements increase exponentially with only small additional increases in acceleration. The graviton field of the drive system is tuned to allow some of the available energy from the antimatter reaction to compensate for the force due to acceleration, reducing the acceleration experienced by passengers in the central habitation ring of the spaceship. "Standard Acceleration" (S